Answer & Solution
Answer: Option
E
Solution:
Copper is universally used for windings of electrical machines due to several reasons:
1. Easily workable: Copper is a highly malleable and ductile metal, making it easy to form into wires and windings without the risk of fracturing.
2. Conductivity: Copper has excellent electrical conductivity, which is crucial for efficient energy transfer and reducing losses in electrical machines.
3. Thermal properties: Copper has good thermal conductivity, allowing it to dissipate heat effectively, which is important for maintaining the temperature of electrical windings.
Option A: Fracture is incorrect because copper does not fracture easily due to its ductility.
Option B: Silver is incorrect because while silver is highly conductive, it is not commonly used in electrical machines due to its high cost.
Option C: Steel is incorrect because steel is not as conductive as copper and is less suitable for electrical windings.
Option D: Aluminium is incorrect because although aluminum is used in some applications, copper is preferred in electrical machines due to its superior conductivity and other properties.
Therefore, the correct answer is Copper.
